[27193] in Athena Bugs
Re: linux 9.4.46 tcp: fails to honor windows
daemon@ATHENA.MIT.EDU (John Hawkinson)
Tue Apr 1 01:56:19 2008
Date: Tue, 1 Apr 2008 01:55:31 -0400
From: John Hawkinson <jhawk@mit.edu>
To: bugs@mit.edu
Message-ID: <20080401055531.GC1172@multics.mit.edu>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200804010338.m313cDTl008349@cutter-john.mit.edu>
X-Spam-Flag: NO
X-Spam-Score: 0.00
Cc: sipb-office@mit.edu
Errors-To: bugs-bounces@mit.edu
Boy, 0/2 tonight.
John Hawkinson <jhawk@MIT.EDU> wrote on Mon, 31 Mar 2008
at 23:38:13 -0400 in <200804010338.m313cDTl008349@cutter-john.mit.edu>:
> 23:05:39.579459 IP
> cutter-john.mit.edu.618 > HUSQVARNA.MIT.EDU.printer:
> P 769:2081(1312) ack 0 win 1460 <nop,nop,timestamp 206674560 446175405>
>
> cutter-john sends the next segment, which is 1,312 bytes long,
> exceeding the receiver's advertised window of 328. This is wrong.
Charles points out that because I didn't catch the beginning
of the TCP conversation (syns), I don't know what the window
scaling was, and that this behavior is perfectly
consistent with a wscale of 4 (328*4 => 1312).
So almost certainly that's what's going on here and there's
no cause for concern. Sorry about that.
> It's been several years since I've had to look at this sort of
> thing, so I'd appreciate if someone could verify that I'm not
> totally off-base and misinterpreting these.
"Just so."
--jhawk
